[rrd-users] changing y values on an up/down graph

Eric J. Bowser ebowser at i-trap.net
Mon Jul 30 16:08:41 CEST 2007

I do not run a legend, I'm talking about the values on the y-axis itself, I
need them to be positive.

Attached is a sample of the graph I'm drawing now.


Simon Hobson wrote:
> Eric J. Bowser wrote:
>> I'd still like to graph my values in both directions from the "0" on the
>> x-axis.  Is this possible, or will I have to put both values going upward?
> You mean you convert one set of values to negative (or collect them 
> that way) so that they plot down from teh X axis, but you want the 
> value printed in teh legend (with gprint) to be positive ?
> Just modify your definitions, eg if both are positive values then :
> value1=<some rrd selection>
> value2=<a different rrd selection>
> value2b=value2 * -1
> plot value1
> plot value2b
> print value1, value2
> So you print the positive value2, but plot the negative value2b 
> derived from it.
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Eric J. Bowser
I-TRAP Internet Security Services
888-658-8727 toll-free
330-658-0123 fax

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